After the Croft show, the truck was caught out in heavy rain a few times without the tarpaulin covering it. I noticed that water was pooling on the cab canvas just behind the screen, and that it was leaking through. 

While working on that, I checked the roof underneath, and found the fabric lifting a little along the edges of the batterns which stop water running forwards into the cab. The areas were given a light sand before being painted with waterproof PVA glue. While wet, a strip of fabric was laid over the battern and the lifting edge of the old fabric, and PVA worked through with a stiff brush before being left to bake in the sun.

There wasn't time to paint these again, but as they are hidden under the canvas, it wasn't too much of an issue for now. However, at some point I'd like to get a coat of exterior white over the area for additional sealing. After they were dry, the cab canvas was re-attached, just in time for some heavy rain that evening! Thankfully, the canvas had dried properly and the water sat in beads on the surface.

The seat complete and in action at Croft Nostalgia. A sample of material has been purchased and it being experimented on for suitability for the seat cushion.